Hybrid Car – More Fun with Less Gas

Plug-In Prius by 2010 - Page 3

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Posted by Was Istloben on June 14, 2008, 9:43 pm

Exactly.   If the premium were 3K to 4K I'd buy it but that isn't going to
happen anytime soon.

Posted by Was Istloben on June 13, 2008, 10:03 pm

I have two meters, and two panels:

The conventional meter/panel combination is billed at .095/kwh for the first
1000Kwh which I *always* exceed and .087/kwh after that.

The off-peak meter/panel combination also includes remote contols for my
furnace, air conditioner and water heater.  They are contolled (shut off)
for intervals not to exceed 4 hours.  The off-peak rate is .043.

In my situation a PHEV would, on average, be parked in my garage for at
least 12 hours/day.  Allowing for a 4-hour control leaves 8 hours of
charging time at .043 while at the same time letting my co-op add that load
when they needed it.

As you can see, it easy to calculate the cost/kwh but without knowing the
efficiency of a PHEV's charging system, batteries, motors ect. it's
impossible to pin down a precise equivalency figure.

Good question.

Posted by Was Istloben on June 14, 2008, 2:00 pm


The article at the link above includes a hypothetical cost of running a
PHEV.  Looks like more snake oil is entering the market too.

Posted by Was Istloben on June 14, 2008, 3:11 pm

Specific to the Hymotion PHEV kit:


At .043/kwh, my off-peak rate, 5 kwh of power would be acquired during a
4-hour charge costing 22 cents presuming the charging efficiency is 100%.
At my regular rate of .087/kwh that charge would cost 44 cents.

Lets presume you average 40 mpg with your Prius, modify it, and get 100 mpg
during the 40-mile phev range.  Instead of burning $.00 worth of gas (at
$.00/gallon) you would burn $.00 worth of gas plus 5 times the cost/kwh of
your electricity or, at my regular rate, 44 cents.  It would be costing me
44 cents for the equivalent of 1/2 gallon of gas or $.88/gallon.  At the
off-peak rate the equivalency would by $.44/gallon.

Looking at it from a different perspective, the phev modification would
reduce the fuel cost from $.00 to $.88 at my regular rate for the first 40
miles after a charge.

Too bad we don't know the charging efficiency, actual mpg and actual phev
range.  If we did, we could create a spreadsheet that would closely estimate
the costs for an individual's situation.  Still, there is enough here for a
rough approximation.

Posted by Michelle Steiner on June 12, 2008, 12:28 pm

A plug-in hybrid will still recharge from the ICE, just as the current
Prius does.  That 200-mile-a-day driver will still benefit from the
hybrid technology.

Support the troops:  Bring them home ASAP.

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